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What is the production of BASF MDI in Ezhou

Release time: 2020-02-09 02:34:35

Add tetrahydrofuran to the reaction kettle, reduce the temperature to below -5 ° C, add fuming sulfuric acid catalyst dropwise under strong stirring, keep the reaction material low temperature, add a certain amount of water under stirring, heat up to 70 ~ 90 ° C, and evaporate the unreacted After the tetrahydrofuran monomer is subjected to steps such as standing for delamination, neutralization, filtration, and vacuum, polytetrahydrofuran diol is prepared.

Outstanding performance of spandex: outstanding high resilience, spandex's high resilience is incomparable with all elastic fibers at present, its elongation at break is greater than 400%, up to 800%, even when 300% tensile deformation , Rebound recovery rate is still more than 95%; excellent tensile strength, tear resistance; weather resistance, UV radiation resistance is strong; chemical resistance, washing resistance; good affinity with dyes.

Polyethers are generally propylene glycol polyethers with a molecular weight of 800-2000, trimethylolpropane polyethers with a molecular weight of 400-4000, and hydroxyl-terminated polytetrahydrofuran.

Rock wool thermal insulation color steel sandwich panel, polyurethane PU core material is made of basalt and other natural ores as the main raw materials, melted into fibers at high temperature, added an appropriate amount of binder, and cured. It is this high-quality raw material that is used, so the polyurethane PU board has a high-strength heat insulation effect. Polyurethane PU board is suitable for thermal insulation and sound insulation of industrial equipment, buildings, ships, etc. It is also suitable for ceilings, partitions, etc. of purification rooms, explosion-proof fire-proof workshops.

After the polyurethane external wall insulation material is made into the external wall insulation system, the correct use of the insulation system and the prevention of fires: strict implementation of various fire protection regulations and fire protection systems; the selection of insulation materials, the initial stage of the use of insulation materials Take good fire prevention measures, monitor the construction process at the intermediate stage of the use of insulation materials, and prevent the possibility of various fires. When purchasing insulation materials for other walls, generally do the following: 1. Check the product appearance. Requires less damage, consistent color, and accurate dimensions (tolerance difference between length and width 4mm, thickness tolerance 2mm). 2. Calculate product density. Choose a piece of product, weigh its weight and measure its volume to calculate the density. On the premise of meeting the strength requirements, the smaller the density, the better. 3. Briefly measure the intensity. The strength requirements of thermal insulation products are mainly to meet the needs of handling, generally not high, it is 1 / 10-1 / 20 of the strength of red bricks, but can not be broken at the touch, and scattered at the pinch. According to the standard requirements, the compressive strength is generally above 0 and 5 MPa, that is, the general product should be able to withstand a person standing lightly on it. The product area should be larger than the foot area to check the product technical documents and quality inspection report.

Miscible with ethanol (decomposed), ether, acetone, carbon tetrachloride, benzene, chlorobenzene, kerosene, olive oil and diethylene glycol methyl ether. poisonous. Carcinogenic potential. Irritating.

Polyurethane materials are widely used in all sectors of the national economy and industrial production, and can be seen everywhere in daily life. Polyurethane material is currently one of the most cost-effective thermal insulation materials in the world. It is widely used in furniture, home appliances, construction, transportation, sports, footwear and leather industry.

TDI and MDI are both the main raw materials of polyurethane, but due to the difference in structure and performance, the subdivision uses are very different.

The CPU made by the polyurethane elastomer casting machine is a wide range and large amount of polyurethane elastomer. Its advantages are temperature resistance, high strength and wide hardness range, and it can be softened and hardened. TPU belongs to thermoplastic polyurethane. Elastomer, its use is only a quarter of the total polyurethane elastomer, its advantage is that the single hardness can be recovered is far less than the CPU.

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